. >>> coming up, bob costas gives his first tv interview with lawrence o'donnell since the controversial comments about guns and murder-suicide involving a nfl player. >> what i was talking about here, and i'm sorry if that wasn't clear to everybody was a gun culture. >>> plus, legalizing pot gets the support after a majority of voters in the first national qui quinnipiac poll on it. >>> you can see. that's the tree we put together for you. that's the "news nation" tree. want to try to crack it? yeah, that's the way to do it! now we need a little bit more... [ male announcer ] at humana, we understand the value of quality time and personal attention. which is why we are proud to partner with health care professionals who understand the difference that quality time with our members can make... that's a very nice cake! ohh! [ giggles ] [ male announcer ] humana thanks the physicians, nurses, hospitals, pharmacists and other health professionals who helped us achieve the highest average star rating among national medicare companies... and become the first and only national medicare advantag